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Table 1 Total blood donations and proportions of hepatitis B virus (HBV) infected donors at two large blood banks in Karachi, 1998–2002

From: Epidemiologic study of chronic hepatitis B virus infection in male volunteer blood donors in Karachi, Pakistan

Blood bank 1 Blood bank 2 Blood banks combined
Year Total HBV+ (%)a Total HBV+ (%)b Total HBV+ (%)c
1998** 15068 117 (0.8) --   -- 15068 117 (0.8)
1999 14856 72 (0.5) 62566 1530 (2.4) 77422 1602 (2.1)
2000 15525 95 (0.6) 66486 1566 (2.4) 82011 1661 (2.0)
2001 15084 230 (1.5) 74154 1654 (2.2) 89238 1884 (2.1)
2002 15219 268 (1.8) 72351 1516 (2.1) 87570 1784 (2.0)
Total 75752 782 (1.0) 75557 6266 (2.3) 351309 7048 (2.0)
  1. **Data for 1998 were not available for blood bank 2;aχ2 trend = 170.81 (P < 0.001); bχ2 trend = 21.28 (P < 0.001); cχ2 trend = 123.05 (P < 0.001)